title: Collaborative studies for the establishment of reference substances for the microbiological assay of antibiotics.
mesh_terms: D000900:Anti-Bacterial Agents / Q000032:analysis* / Q000592:standards*; D005060:Europe; D007391:International Cooperation; D008828:Microbiological Techniques / Q000379:methods / Q000592:standards; D010602:Pharmacopoeias as Topic / Q000592:standards; D012015:Reference Standards
chemical_list: D000900:Anti-Bacterial Agents